Modulation of Phosphoprotein Activity by Phosphorylation Targeting Chimeras (PhosTACs)
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Protein phosphorylation, which regulates many critical aspects of cell biology, is dynamically governed by kinases and phosphatases. Many diseases are associated with dysregulated hyperphosphorylation of critical proteins, such as retinoblastoma protein in cancer. Although kinase inhibitors have been widely applied in the clinic, growing evidence of off-target effects and increasing drug resistance prompts the need to develop a new generation of drugs. Here, we propose a proof-of-concept study of phosphorylation targeting chimeras (PhosTACs). Similar to PROTACs in their ability to induce ternary complexes, PhosTACs focus on recruiting a Ser/Thr phosphatase to a phosphosubstrate to mediate its dephosphorylation. However, distinct from PROTACs, PhosTACs can uniquely provide target gain-of-function opportunities to manipulate protein activity. In this study, we applied a chemical biology approach to evaluate the feasibility of PhosTACs by recruiting the scaffold and catalytic subunits of the PP2A holoenzyme to protein substrates such as PDCD4 and FOXO3a for targeted protein dephosphorylation. For FOXO3a, this dephosphorylation resulted in the transcriptional activation of a FOXO3a-responsive reporter gene.
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Crews laboratory developed PhosTACs after PROTAC.
“Crews laboratory developed another novel regulatory tool after PROTAC, namely Phosphorylation Targeting Chimeras (PhosTACs).”
From Role of Tau Protein in Neurodegenerative Diseases and Development of Its Targeted Drugs: A Literature Review (2024) · cites this paper as [205]
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- Authors
- Chen, P.-H., Hu, Z., An, E., Okeke, I., Zheng, S., Luo, X., Gong, A., Jaime-Figueroa, S., & Crews, C. M.
- Affiliations
- Yale University (US)
- Department of Molecular, Cellular, and Developmental Biology, Yale University, Yale Science Building, 260 Whitney Avenue, P.O. Box 208103, New Haven, Connecticut 06520-8103, United States
- Corresponding author
- Crews, Craig M.
- Venue
- ACS Chemical Biology
- Publisher
- American Chemical Society (ACS)
- Published
- 2021-11-15
- Volume
- 16
- Issue
- 12
- Pages
- 2808-2815
- ISSN
- 1554-8929 (ISSN-L)
- 1554-8937
- PMC
- PMC10437008
- OpenAlex
- W3212685950
- Cited by
- 130
- References
- 37
- Citations by year
- 2026: 33 · 2025: 30 · 2024: 25 · 2023: 24 · 2022: 18
- FWCI
- 5.26
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- Locations
- ACS Chemical Biology (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Cancer Institute (R35 CA197589)
- Defense Advanced Research Projects Agency (HR0011-20-2-0051)
- Halda Therapeutics, LLC
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
- Keywords
- protein dephosphorylation, PP2A holoenzyme, PROTACs, ternary complex, PDCD4, FOXO3, hyperphosphorylation, kinase inhibitors, drug resistance, transcriptional activation
- MeSH terms
- Forkhead Box Protein O3, Chimera, Enzyme Activation, HeLa Cells, Humans, Phosphoproteins, Phosphorylation, Structure-Activity Relationship, RNA-Binding Proteins, Protein Tyrosine Phosphatases, Holoenzymes, Catalytic Domain, Apoptosis Regulatory Proteins
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